package cn.wenlwan.server;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;


/**
 * creator: maokai
 * on: 2018/2/22
 * description:
 */
public class DiscardServer {

    private int port;

    public DiscardServer (int port) {
        this.port = port;
    }

    public void run () throws InterruptedException {
        //是用来处理I/O操作的多线程事件循环器
        EventLoopGroup bossGroup = new NioEventLoopGroup();
        EventLoopGroup workerGroup = new NioEventLoopGroup();
        try {
            ServerBootstrap bootstrap = new ServerBootstrap();
            bootstrap.group( bossGroup , workerGroup )
                    .channel( NioServerSocketChannel.class )
                    .childHandler( new ChannelInitializer<SocketChannel>() {
                        @Override
                        protected void initChannel (SocketChannel socketChannel) throws Exception {
                            socketChannel.pipeline().addLast( new DiscardServerHandler() );
                        }
                    } ).option( ChannelOption.SO_BACKLOG , 128 )
                    .childOption( ChannelOption.SO_KEEPALIVE , false );

            ChannelFuture future = bootstrap.bind( port ).sync();

            future.channel().closeFuture().sync();

        } finally {
            bossGroup.shutdownGracefully();
            workerGroup.shutdownGracefully();
        }

    }

    public static void main (String[] args) throws InterruptedException {
        int port;
        if (args.length > 0) {
            port = Integer.parseInt( args[0] );
        } else {
            port = 8080;
        }
        new DiscardServer( port ).run();
    }
}
